Lets pretend that I said on /pol/ I was going to light Napalm in the Scottish Parliament, the next morning this is all over the news:
>"Edinburgh under attack: Scottish Parliament razed" and "Terrorist firebombs Holyrood, 27 including 10 MSPs confirmed dead"
Would 4chan be legally obliged to do anything? What would happen to the site?
>>424163
you are on a watchlist now regardless
>>424172
>anyone who posts on 4chan is already on a watchlist
"no"
>>424163
good luck anon
they'd have to do whatever the subpoena/warrant told them to do, which would probably be give out your ip address and whatever other posts you've made. there's not much more they can do. i don't think they'd legally have to warn anyone ahead of time.
If your scenario happened, 4chan would have to answer to every request that the British Government would make considering that would've been out of the police's level of expertise.